Recent developments on 2D-materials for gas sensing application

Area of Science:

• Materials Science
• Environmental Science
• Chemical Engineering

Background:

• Industrialization releases hazardous gases (CO, NO, NH3, H2, H2S, VOCs), impacting ecosystems and living beings.
• Current gas sensors using metal oxide nanomaterials lack sensitivity and require high operating temperatures.
• There is a critical need for efficient gas monitoring systems to manage environmental pollution.

Purpose of the Study:

• To review recent advancements in two-dimensional (2D) materials for gas sensing applications.
• To highlight the synthesis, characterization, and properties of 2D materials for gas detection.
• To discuss the potential of 2D materials in developing highly sensitive and scalable chemiresistive gas sensors.

Main Methods:

• Review of literature on 2D materials including Graphene, MoS2, WS2, h-BN, and their heterostructures.
• Analysis of synthesis and characterization techniques for 2D materials.
• Evaluation of gas sensing parameters (sensitivity, selectivity, response time, etc.) for various 2D materials.

Main Results:

• 2D materials possess unique properties (high surface area, tunable electronic properties) making them ideal for gas sensing.
• Chemiresistive gas sensors based on 2D materials demonstrate high sensitivity and scalability.
• Doping, functionalization, and heterostructure formation enhance the gas sensing performance of 2D materials.

Conclusions:

• 2D materials offer significant advantages over traditional materials for gas sensing applications.
• Further research into 2D materials will drive the development of next-generation, highly efficient gas sensors.
• These advanced sensors are crucial for effective environmental monitoring and pollution control.